batgrbproduct Analysis for Trigger=557976
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Jun 12 22:42:34 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557976/GCN5_download_cron
======================================================================
Trigger: 00557976 Segment: 000
BAT Trigger Time: 392700152.832 [s; MET]
Trigger Stop: 392700153.856 [s; MET]
UTC: 2013-06-12T03:22:22.167880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 259.804329470416 Dec: 16.7058164669719 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.62
Image Trigger?: NO
Rate S/N Ratio: 14.6287388383278 [ if not an image trigger ]
Image S/N Ratio: 7.62
Flight Position: [ source = BAT ]
RA: 259.804329470416 Dec: 16.7058164669719 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 259.761157935817 Dec: 16.7418662382706 [deg; J2000]
{ 17h 19m 02.7s , +16d 44' 30.7" }
+/- 2.42506523360577 [arcmin] (estimated 90% radius based on SNR)
+/- 1.34103360554607 [arcmin] (formal 1-sigma fit error)
SNR: 8.58051759918928
Angular difference between Flight and Ground position is 3.291281 arcmin
Partial Coding Fraction: 0.3476562 [ including projection effects ]
Duration
T90: 112 +/- 65.9696900098826
Measured from: -3.83199989795685
to: 108.168000102043 [s; relative to TRIGTIME]
T50: 32 +/- 48
Measured from: -3.83199989795685
to: 28.1680001020432 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.66799998283386
to: 4.66799998283386 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.83200001716614
to: 124.167999982834 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.239621 0.459578 0.131410 0.149697
0.093279 0.099989 0.092658 0.095720 [error]
Peak 0.011710 0.015786 -0.010469 -0.007173
0.011089 0.011767 0.011178 0.010680 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 9.38e-08 1.49e-07 1.79e-07 4.18e-07 5.42e-07 8.41e-07 erg/cm2
Error 3.99e-08 4.71e-08 8.31e-08 4.63e-07 2.03e-07 4.83e-07 erg/cm2
Peak flux Power-law 1.44e-01 7.14e-02 2.16e-02 8.29e-03 2.42e-01 2.46e-01 ph/cm2/s
Error 1.62e-01 8.38e-02 4.69e-02 2.21e-01 2.63e-01 2.72e-01 ph/cm2/s
Fluence Cutoff-PL 7.12e-08 2.43e-07 5.15e-08 9.08e-11 3.66e-07 3.66e-07 erg/cm2
Error 4.39e-08 7.65e-08 9.41e-08 1.89e-08 1.42e-07 1.43e-07 erg/cm2
Peak flux Cutoff-PL 9.04e-02 1.65e-01 5.07e-03 2.91e-08 2.61e-01 2.61e-01 ph/cm2/s
Error 1.41e-01 1.19e-01 4.11e-02 2.73e-02 2.51e-01 2.51e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 7.18e-01 7.89e-01 1.68e-01 1.71e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 2.24e-01 1.79e-01 1.40e-01 3.48e-01 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.737 0.513 - - 4.67e-04 1.69e-04 44.790 57
CPL -5.286 0.000 35.7 9.3 1.34e+01 1.14e+04 38.190 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.743 0.000 - - 1.05e-03 1.71e-03 55.270 57
CPL -0.960 0.000 29.8 0.0 2.34e-01 0.00e+00 54.410 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 128.000 -3.832 124.168
T90 112.000 -3.832 108.168
T50 32.000 -3.832 28.168
Peak 1.000 3.668 4.668
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
259.7612 +16.7419 0.0225 34.5 40.9 1.0012 8.6 TRIG_00557976
------------------------------------------
Foreground time interval of the image:
-3.832 17.169 (delta_t = 21.001 [sec])
Background time interval of the image:
-179.832 -3.832 (delta_t = 176.000 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-3.832000 62.408000
63.168000 65.603600
67.168000 124.168000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73705 ( -0.492829 0.53298 )
Norm@50keV : 4.67104E-04 ( -0.000170284 0.000166833 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.79 using 59 PHA bins.
# Reduced chi-squared = 0.7858 for 57 degrees of freedom
# Null hypothesis probability = 8.796485e-01
Photon flux (15-150 keV) in 125.7 sec: 6.28624E-02 ( -0.0198481 0.0198494 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.41863e-07 ( -1.96268e-07 2.09904e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-3.832000 62.408000
63.168000 65.603600
67.168000 124.168000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.28581 ( )
Epeak [keV] : 35.7352 ( -5.88409 12.8159 )
Norm@50keV : 13.4437 ( -14.2282 22841.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.19 using 59 PHA bins.
# Reduced chi-squared = 0.6819 for 56 degrees of freedom
# Null hypothesis probability = 9.670820e-01
Photon flux (15-150 keV) in 125.7 sec: 5.63946E-02 ( -0.0176839 0.0186743 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65756e-07 ( -1.21888e-07 1.62118e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-3.832000 62.408000
63.168000 65.603600
67.168000 124.168000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.61079 -5 )
beta : -3.46606 ( 3.46472 1.41623 )
Epeak [keV] : 34.5854 ( -7.77261 7.48284 )
Norm@50keV : 10.8771 ( -3.07616 40.3252 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.57 using 59 PHA bins.
# Reduced chi-squared = 0.6831 for 55 degrees of freedom
# Null hypothesis probability = 9.651483e-01
Photon flux (15-150 keV) in 125.7 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0427 (-2.26829 3.16734)
R^2/D10^2 : 3.32281E-02 (-0.0332281 0.0532955)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.35 using 59 PHA bins.
# Reduced chi-squared = 0.6903 for 57 degrees of freedom
# Null hypothesis probability = 9.640195e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.592e-08 5.203e-08
25- 50 2.149e-07 1.326e-07
50-150 1.136e-07 8.449e-08
15-150 4.144e-07 2.346e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.3945 (-46.8906 -82.3192)
Norm : 0.300783 (-0.106031 0.1651)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.37 using 59 PHA bins.
# Reduced chi-squared = 0.7609 for 57 degrees of freedom
# Null hypothesis probability = 9.084895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.828e-08 5.983e-08
25- 50 1.629e-07 1.008e-07
50-150 2.345e-07 2.045e-07
15-150 4.957e-07 3.427e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.127575 (1.64499 -0.127575)
R1^2/D10^2 : 3.78296E+14 (-3.78296e+14 -3.78296e+14)
kT2 [keV] : 10.0428 (-2.26843 3.16719)
R2^2/D10^2 : 3.32265E-02 (-0.0332265 0.0532972)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.35 using 59 PHA bins.
# Reduced chi-squared = 0.7154 for 55 degrees of freedom
# Null hypothesis probability = 9.450087e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 3.668 sec. to 4.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.74295 ( -2.70737 -2.70737 )
Norm@50keV : 1.05185E-03 ( -0.00105502 0.00236293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.27 using 59 PHA bins.
# Reduced chi-squared = 0.9697 for 57 degrees of freedom
# Null hypothesis probability = 5.401054e-01
Photon flux (15-150 keV) in 1 sec: 0.242106 ( -0.242106 0.284272 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14565e-08 ( -1.14565e-08 2.00316e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.668 sec. to 4.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.959946 ( )
Epeak [keV] : 29.7951 ( )
Norm@50keV : 0.233959 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.41 using 59 PHA bins.
# Reduced chi-squared = 0.9715 for 56 degrees of freedom
# Null hypothesis probability = 5.353987e-01
Photon flux (15-150 keV) in 1 sec: 0.260636 ( -0.260636 0.242348 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2193e-08 ( -1.2193e-08 1.3003e-08 ) ergs/cm2
Band function
Time interval is from 3.668 sec. to 4.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.93652 ( -4.93652 -4.93652 )
beta : -9.34826 ( 9.34826 13.7404 )
Epeak [keV] : 31.7903 ( -31.7903 25.6894 )
Norm@50keV : 82.6786 ( -82.6786 7.34316e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.99 using 59 PHA bins.
# Reduced chi-squared = 0.9817 for 55 degrees of freedom
# Null hypothesis probability = 5.130669e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.87335 (-7.73727 10.8518)
R^2/D10^2 : 0.368856 (-0.376743 -0.376743)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.30 using 59 PHA bins.
# Reduced chi-squared = 0.9526 for 57 degrees of freedom
# Null hypothesis probability = 5.771133e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.085e-09 3.169e-09
25- 50 6.953e-09 5.935e-09
50-150 1.732e-09 1.951e-09
15-150 1.277e-08 1.103e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.2513 (-26.0887 -26.0887)
Norm : 2.42964 (-2.4362 -2.4362)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.87 using 59 PHA bins.
# Reduced chi-squared = 0.9627 for 57 degrees of freedom
# Null hypothesis probability = 5.553078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.589e-09 3.709e-09
25- 50 4.850e-09 3.943e-09
50-150 2.213e-09 3.247e-09
15-150 1.165e-08 9.880e-09
Double BB
R1^2/D10^2 : 9.85208E+05 ( )
kT2 [keV] : 8.22431 (-8.13544 -8.13544)
R2^2/D10^2 : 0.288869 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.30 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.05 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.03 using 59 PHA bins.
# Reduced chi-squared = 0.9872 for 55 degrees of freedom
# Reduced chi-squared = 0.9827 for 55 degrees of freedom
# Reduced chi-squared = 0.9823 for 55 degrees of freedom
# Null hypothesis probability = 5.014575e-01
# Null hypothesis probability = 5.110135e-01
# Null hypothesis probability = 5.118600e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.121e-09 1.952e-01
25- 50 6.949e-09 1.690e+00
50-150 1.701e-09 4.201e+01
15-150 1.277e-08 4.428e+01
Plot creation:
Wed Jun 12 23:11:34 EDT 2013